Tuned a friends 2001 LB7 the other day and not it's not the tune. But he was having and is still having a $0093 code. His injectors have been replaced and he has a lift pump. I watched the desired and actualy fuel pressures and the actual is lagging behind the desired so it's not getting full fuel pressure. What would you guys think, CP3 going out? Oh it takes some extra cranking to get it started too